2J6L

Structure of aminoadipate-semialdehyde dehydrogenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.137 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Aldehyde Dehydrogenase 7A1 (Aldh7A1) is a Novel Enzyme Involved in Cellular Defense Against Hyperosmotic Stress.

Brocker, C.Lassen, N.Estey, T.Pappa, A.Cantore, M.Orlova, V.V.Chavakis, T.Kavanagh, K.L.Oppermann, U.Vasiliou, V.

(2010) J.Biol.Chem. 285: 18452

  • DOI: 10.1074/jbc.M109.077925

  • PubMed Abstract: 
  • Mammalian ALDH7A1 is homologous to plant ALDH7B1, an enzyme that protects against various forms of stress, such as salinity, dehydration, and osmotic stress. It is known that mutations in the human ALDH7A1 gene cause pyridoxine-dependent and folic ac ...

    Mammalian ALDH7A1 is homologous to plant ALDH7B1, an enzyme that protects against various forms of stress, such as salinity, dehydration, and osmotic stress. It is known that mutations in the human ALDH7A1 gene cause pyridoxine-dependent and folic acid-responsive seizures. Herein, we show for the first time that human ALDH7A1 protects against hyperosmotic stress by generating osmolytes and metabolizing toxic aldehydes. Human ALDH7A1 expression in Chinese hamster ovary cells attenuated osmotic stress-induced apoptosis caused by increased extracellular concentrations of sucrose or sodium chloride. Purified recombinant ALDH7A1 efficiently metabolized a number of aldehyde substrates, including the osmolyte precursor, betaine aldehyde, lipid peroxidation-derived aldehydes, and the intermediate lysine degradation product, alpha-aminoadipic semialdehyde. The crystal structure for ALDH7A1 supports the enzyme's substrate specificities. Tissue distribution studies in mice showed the highest expression of ALDH7A1 protein in liver, kidney, and brain, followed by pancreas and testes. ALDH7A1 protein was found in the cytosol, nucleus, and mitochondria, making it unique among the aldehyde dehydrogenase enzymes. Analysis of human and mouse cDNA sequences revealed mitochondrial and cytosolic transcripts that are differentially expressed in a tissue-specific manner in mice. In conclusion, ALDH7A1 is a novel aldehyde dehydrogenase expressed in multiple subcellular compartments that protects against hyperosmotic stress by generating osmolytes and metabolizing toxic aldehydes.


    Organizational Affiliation

    Department of Pharmaceutical Sciences, University of Colorado Denver, Aurora, Colorado 80045, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALDEHYDE DEHYDROGENASE FAMILY 7 MEMBER A1
A, B, C, D, E, F, G, H
500Homo sapiensGene Names: ALDH7A1 (ATQ1)
EC: 1.2.1.8, 1.2.1.3, 1.2.1.31
Find proteins for P49419 (Homo sapiens)
Go to Gene View: ALDH7A1
Go to UniProtKB:  P49419
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
BR
Query on BR

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Download CCD File 
A, B, C, D, E, F, G, H
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
NAI
Query on NAI

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE
NADH
C21 H29 N7 O14 P2
BOPGDPNILDQYTO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.137 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 155.289α = 90.00
b = 162.326β = 94.17
c = 159.016γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-12
    Type: Initial release
  • Version 1.1: 2015-05-20
    Type: Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance